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中文摘要：
以喷雾干燥处理的偏钨酸铵为前驱体,分别采用CH4/H2和CO/CO2为还原碳化气氛,利用固定床气固反应法制备了两种具有介孔结构的碳化钨（WC）粉体.以WC粉末作为电催化材料制成了碳化钨粉末微电极（WC-PME）,并采用循环伏安和线性扫描等方法研究了酸性溶液中两种介孔结构WC对α-硝基萘（NP）电还原过程中的电催化行为.结果表明,以CH4/H2为还原碳化气氛所制备的WC粉末,其制成的粉末微电极对NP具有更良好的电催化活性,这主要与该WC粉末的结构形貌及其制备后的处理工艺有关,同时该WC-PME具有良好的化学稳定性.
英文摘要：
By using ammonium metatungstate （AMT） which was treated by spay drying as precursors, two different hollow global tungsten carbide （WC） catalysts with meso-porosity were prepared by the gassolid reaction in the atmosphere of CH4/H2 and CO/CO2 respectively. Tungsten carbide powder microelectrodes （WC-PMEs） were prepared from the above WC powders. The electrochemical reduction behavior of α-nitronaphthalene （Np） on the WC-PME was investigated by using the electrochemical techniques of cyclic voltammetry and linear sweep voltammetry. The result showed that the powder microelectrode with WC prepared in the CH4/H2 atmosphere showed better catalytic activity for α-nitronaphthalene electrochemical reduction. This result was mainly attributed to different post treatments and surface morphological structures of two types of WC powders. Moreover, the WC-PME with WC prepared in the CH4/H2 atmosphere showed good chemical stability.
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